Mobile power supply



FIG. 1 is a perspective view of a mobile power supply, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is another perspective view thereof.

The dashed or broken lines shown in the drawings depict portions of the mobile power supply in which the design is embodied that form no part of the claimed design. 

CLAIM The ornamental design for a mobile power supply, as shown and described. 